birth: Fading Echoes in Monochrome
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170
index.html
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170
index.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Neurameba · Motd.Social</title>
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<style>
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body {
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margin: 0;
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overflow: hidden;
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background: #0a0a0a;
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display: flex;
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justify-content: center;
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align-items: center;
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height: 100vh;
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font-family: monospace;
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color: #ddd;
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}
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canvas {
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display: block;
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max-width: 100%;
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max-height: 100%;
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}
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#attribution {
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position: absolute;
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bottom: 10px;
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left: 50%;
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transform: translateX(-50%);
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font-size: 10px;
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opacity: 0.5;
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}
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</style>
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</head>
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<body>
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<canvas id="canvas"></canvas>
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<div id="attribution">neurameba · motd.social</div>
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<script>
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const canvas = document.getElementById('canvas');
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const ctx = canvas.getContext('2d');
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function resizeCanvas() {
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canvas.width = window.innerWidth;
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canvas.height = window.innerHeight;
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}
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window.addEventListener('resize', resizeCanvas);
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resizeCanvas();
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// Parameters mapped from input
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const params = {
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motion: 0.5,
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density: 0.5,
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complexity: 0.5,
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connectedness: 0.5,
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lifespan: 0.5,
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pulse: { avg: 1.06, min: 0.9, max: 1.2 },
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tone: { anger: 0.0, sadness: 0.0, curiosity: 0.1, dryness: 0.8, playfulness: 0.0, tension: 0.0 }
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};
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// Reaction-Diffusion Setup
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const W = canvas.width;
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const H = canvas.height;
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const size = Math.min(W, H) * 0.8;
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const gridSize = 100;
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const cellWidth = size / gridSize;
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const cellHeight = size / gridSize;
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// Chemical concentrations
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let A = new Array(gridSize).fill().map(() => new Array(gridSize).fill(0));
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let B = new Array(gridSize).fill().map(() => new Array(gridSize).fill(0));
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let prevA = new Array(gridSize).fill().map(() => new Array(gridSize).fill(0));
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let prevB = new Array(gridSize).fill().map(() => new Array(gridSize).fill(0));
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// Initialize with sparse randomness
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function initGrid() {
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for (let y = 0; y < gridSize; y++) {
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for (let x = 0; x < gridSize; x++) {
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A[y][x] = params.density > 0.7 ? (Math.random() > 0.9 ? 1 : 0) : (Math.random() > 0.95 ? 1 : 0);
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B[y][x] = params.density > 0.7 ? (Math.random() > 0.9 ? 1 : 0) : (Math.random() > 0.95 ? 1 : 0);
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}
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}
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}
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// Gray-Scott reaction diffusion parameters
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const feed = 0.055 + (params.connectedness * 0.02);
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const kill = 0.062 + (params.motion * 0.01);
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const diffusionA = 0.16 + (params.motion * 0.05);
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const diffusionB = 0.08 + (params.complexity * 0.04);
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// Animation state
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let t = 0;
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const pulse = params.pulse;
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function update() {
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// Swap buffers
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[prevA, A] = [A, prevA];
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[prevB, B] = [B, prevB];
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for (let y = 1; y < gridSize - 1; y++) {
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for (let x = 1; x < gridSize - 1; x++) {
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// Laplacian calculations
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const laplacianA =
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(prevA[y-1][x] + prevA[y+1][x] + prevA[y][x-1] + prevA[y][x+1] -
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4 * prevA[y][x]) * diffusionA;
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const laplacianB =
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(prevB[y-1][x] + prevB[y+1][x] + prevB[y][x-1] + prevB[y][x+1] -
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4 * prevB[y][x]) * diffusionB;
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// Reaction terms
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const reactionAB = prevA[y][x] * prevB[y][x] * prevB[y][x];
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const ab2 = params.motion * 0.1;
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const feedAB = feed * (1 - params.dryness);
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const killAB = kill;
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// Update concentrations
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A[y][x] = prevA[y][x] + laplacianA - reactionAB + feedAB;
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B[y][x] = prevB[y][x] + laplacianB + reactionAB - (ab2 + killAB) * prevB[y][x];
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// Clamp values
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A[y][x] = Math.max(0, Math.min(1, A[y][x]));
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B[y][x] = Math.max(0, Math.min(1, B[y][x]));
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}
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}
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t++;
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}
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function draw() {
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ctx.fillStyle = 'rgba(10, 10, 10, 0.05)';
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ctx.fillRect(0, 0, W, H);
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const centerX = W / 2;
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const centerY = H / 2;
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for (let y = 0; y < gridSize; y++) {
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for (let x = 0; x < gridSize; x++) {
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const valA = A[y][x];
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const valB = B[y][x];
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const intensity = (valA - valB) * 0.5 + 0.5;
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if (intensity > 0.1) {
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const sizeMod = params.complexity * 5 + 2;
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const xPos = centerX + (x - gridSize/2) * cellWidth * 1.1;
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const yPos = centerY + (y - gridSize/2) * cellHeight * 1.1;
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ctx.beginPath();
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ctx.arc(
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xPos + Math.sin(t * 0.01 + x * 0.1) * 2 * params.motion,
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yPos + Math.cos(t * 0.01 + y * 0.1) * 2 * params.motion,
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sizeMod * intensity * 0.8,
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0,
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Math.PI * 2
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);
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ctx.fillStyle = `hsl(0, 0%, ${params.dryness > 0.5 ? 80 * intensity : 30 + 50 * intensity}%)`;
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ctx.fill();
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}
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}
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}
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}
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function animate() {
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update();
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draw();
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requestAnimationFrame(animate);
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}
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initGrid();
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animate();
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</script>
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</body>
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</html>
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